To rejuvenate a "middle aged" ; ) bagel, I slice it in half and put it, cut side up in the steamer. Steam gently, just till warm/softened. If it feels a little wet for your taste, you can pop it in the broiler for a moment to crisp the toastable surfaces. I hope this helps : )

Thanks for the ideas! I appreciate your help.My mother-in-law was visiting this weekend, and she told me to wrap the bagel in a paper towel, and microwave for 30 seconds at half power, check to see if it is soft, and repeat as many times as it takes to get soft. This works with frozen bagels too, since I tried it this morning!